v. to casually beep or honk the horn of an automobile, usually practiced by men, while observing the fine badonkadonk or (usually large and/or round) derriere of a random woman or women on the street, whether they are walking, jogging, or standing. Not to be confused with ass-grabbing.

"Man, I donk-honked at this chick walkin' down Eastern Ave. She had a fine ass and I had to let her know that I noticed. She smiled back at me, too."